Step 5 Preview
Step 5 Preview is a StepFun model for agentic work, including software engineering. It accepts text, images, and video, produces text, and supports reasoning and tool calling.
Step 5 Preview specs and pricing
- Provider: StepFun
- Released: October 8, 2026
- Context window: 1M tokens
- Max output: 64K tokens
- Input: text, images, video
- Output: text
- Price: $1.00 input / $2.70 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What Step 5 Preview is good at
- Software engineering tasks
- Analyzing images and video
- Agent workflows that use tools
To-dos to try with Step 5 Preview
- Review this code and suggest fixes for potential bugs.
- Describe the visible elements in this image.
- Summarize the events shown in this video.
FAQ
- Who makes Step 5 Preview? Step 5 Preview is made by StepFun.
- Can Step 5 Preview understand images and video? It accepts both images and video as input and produces text output.
- How much does Step 5 Preview cost? Step 5 Preview costs $1.00 per million input tokens and $2.70 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 3.18 credits ($1 = 100 credits).
- What is the context window of Step 5 Preview? Step 5 Preview can read up to 1M tokens at once and write up to 64K tokens in one reply.
- Can I use Step 5 Preview without coding? Yes. In todo.is you pick Step 5 Preview as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.